Question 1
A 0.307-g sample of an unknown triprotic acid is titrated to the third equivalence point using 35.2 mL of 0.106 M NaOH. Calculate the molar mass of the acid.
◦
247 g/mol◦
171 g/mol◦
165 g/mol◦
151 g/mol◦
82.7 g/molQuestion 2
A 1.75-g sample of a metal chloride, MCl2, is dissolved in water and treated with excess aqueous silver nitrate. The silver chloride that formed weighed 3.73 g. Calculate the molar mass of M.
◦
70.9 g/mol◦
32 g/mol◦
63.5 g/mol◦
67 g/mol◦
72.4 g/mol